| /********************************************************************** |
| * Copyright (c) 2014 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials are |
| * made available under the terms of the Eclipse Public License 2.0 which |
| * accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Bernd Hufmann - Initial API and implementation |
| **********************************************************************/ |
| package org.eclipse.tracecompass.tmf.ui.viewers.xycharts; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.MouseEvent; |
| import org.eclipse.swt.events.MouseListener; |
| import org.eclipse.swt.events.MouseMoveListener; |
| import org.swtchart.IAxis; |
| import org.swtchart.Range; |
| |
| /** |
| * Class for updating time ranges based on middle mouse button drag. |
| * It also notifies the viewer about a change of range. |
| * |
| * @author Bernd Hufmann |
| */ |
| public class TmfMouseDragProvider extends TmfBaseProvider implements MouseListener, MouseMoveListener { |
| |
| // ------------------------------------------------------------------------ |
| // Attributes |
| // ------------------------------------------------------------------------ |
| /** Cached start time */ |
| private long fStartTime; |
| /** Cached end time */ |
| private long fEndTime; |
| /** Flag indicating that an update is ongoing */ |
| private boolean fIsUpdate; |
| /** Cached position when mouse button was pressed */ |
| private int fStartPosition; |
| |
| // ------------------------------------------------------------------------ |
| // Constructors |
| // ------------------------------------------------------------------------ |
| /** |
| * Default constructor |
| * |
| * @param tmfChartViewer |
| * the chart viewer reference. |
| */ |
| public TmfMouseDragProvider(ITmfChartTimeProvider tmfChartViewer) { |
| super(tmfChartViewer); |
| register(); |
| } |
| |
| // ------------------------------------------------------------------------ |
| // TmfBaseProvider |
| // ------------------------------------------------------------------------ |
| @Override |
| public void register() { |
| getChart().getPlotArea().addMouseListener(this); |
| getChart().getPlotArea().addMouseMoveListener(this); |
| } |
| |
| @Override |
| public void deregister() { |
| if ((getChartViewer().getControl() != null) && !getChartViewer().getControl().isDisposed()) { |
| getChart().getPlotArea().removeMouseListener(this); |
| getChart().getPlotArea().removeMouseMoveListener(this); |
| } |
| } |
| |
| @Override |
| public void refresh() { |
| // nothing to do |
| } |
| |
| // ------------------------------------------------------------------------ |
| // MouseListener |
| // ------------------------------------------------------------------------ |
| @Override |
| public void mouseDoubleClick(MouseEvent e) { |
| // Do nothing |
| } |
| |
| @Override |
| public void mouseDown(MouseEvent e) { |
| if ((getChartViewer().getWindowDuration() != 0) && ((e.button == 2) || (e.button == 1 && (e.stateMask & SWT.CTRL) != 0))) { |
| fStartPosition = e.x; |
| fIsUpdate = true; |
| } |
| } |
| |
| @Override |
| public void mouseUp(MouseEvent e) { |
| if ((fIsUpdate) && (fStartTime != fEndTime)) { |
| ITmfChartTimeProvider viewer = getChartViewer(); |
| viewer.updateWindow(fStartTime, fEndTime); |
| } |
| fIsUpdate = false; |
| } |
| |
| // ------------------------------------------------------------------------ |
| // MouseMoveListener |
| // ------------------------------------------------------------------------ |
| @Override |
| public void mouseMove(MouseEvent e) { |
| if (fIsUpdate) { |
| IAxis xAxis = getChart().getAxisSet().getXAxis(0); |
| |
| ITmfChartTimeProvider viewer = getChartViewer(); |
| |
| fStartTime = viewer.getWindowStartTime(); |
| fEndTime = viewer.getWindowEndTime(); |
| |
| long startTime = viewer.getStartTime(); |
| long endTime = viewer.getEndTime(); |
| |
| long delta = 0; |
| if (fStartPosition > e.x) { |
| delta = (long) (xAxis.getDataCoordinate(fStartPosition) - xAxis.getDataCoordinate(e.x)); |
| long max = endTime - fEndTime; |
| delta = Math.max(0, Math.min(delta, max)); |
| fStartTime = fStartTime + delta; |
| fEndTime = fEndTime + delta; |
| } else if (fStartPosition < e.x) { |
| delta = (long) (xAxis.getDataCoordinate(e.x) - xAxis.getDataCoordinate(fStartPosition)); |
| long max = fStartTime - startTime; |
| delta = Math.max(0, Math.min(delta, max)); |
| fStartTime = fStartTime - delta; |
| fEndTime = fEndTime - delta; |
| } |
| |
| xAxis.setRange(new Range(fStartTime - viewer.getTimeOffset(), fEndTime - viewer.getTimeOffset())); |
| getChart().redraw(); |
| } |
| } |
| } |